March 4, 2015, Wednesday

Andrew Lack, the first chief executive of the Broadcasting Board of Governors, represents a sea change for the agency, which oversees United States government-supported civilian international news media.

PLOPPED in a white leather chair in a small office in Bloomberg L.P's Manhattan headquarters, Andrew Lack knows exactly how to articulate the aspirations of this 28-year-old media and technology company. ''We want to be the world's most...